Aeroplane radiator



March .31, 1931.

M. LOBELLE AEROPLANE RADIATOR 3 Sheets-Sheet l ed oct. le, 1928 March 3l, 1931'. M. LOBELLE AEROPLANE RADIATOR Filed oct. 16, 192e 3 sheets-Sheet 2 March 31,1931. M. LOBELLE 1,799,107

AEROPLANE RADIATOR Filed Oct. 16, 192B 3 Sheets-Sheet 3 Patented Mar. 31, 1931 -lliunznr STATES PATENT ovl-FICE MARCEL `LOBELLE, OIF HAYES, ENGLANI), ASSIGNOR TO CHARLES RICHARD FAIREY, OF

HAYES, ENGLAND AEROPLLANE RADIATOR Application filed October 16, 1928, Serial 170.312,8410, and in Great Britain October 27, 1927.

This invention relates to radiatorspai-ticularly those for usefon aircraft, whether of the heavier or lighter-than-air type, and although it can be adapted for use Withradi- Y f, ators for other purposes, such as fast motor boats or cars for example, it will be described f ator tubes or the like andthe controlling ele# ments thereof, vas t0"obviate this risk, and for this purpose a radiator comprises two or more series of :tubes or the like arranged in regularlyorirregularly interspersed sequence, and so connected with the'water jacket of the engine (or with a like container) that one series of tubes is always in circuit Whilst the other or others may be cut out at will, the

interspersion of said tubes enabling the heat radiated or otherwise transmitted from the series of tubes in circuit to prevent the water or the like in those which are not inuse from becoming cooled unduly or freezing.

In order to obtain the desired regulation of the effective area of the radiator the opposite ends of the tubes ofthe first series of tubes ma be in open connection with the water jac :et of the engine, oneV end of each tube of the second series, and of each subsequent series, if any, being in open connection with said water jacket, and the other end of each tube of the second series, and of each subsequent series, if any, being in valve-controlled connection with said water jacket, whilst, preferably, a valve-controlled byepass is adapted to establish direct connection between the pipes leading to and from said water jacket, the arrangement being such that the first series of tubes is always in cir` cuit whilst the second serie-s (and each subsequent series, if any) may be cut out of circuit, (successively) ,the bye-pass, if provided, being -opened (progressively) as the second tubes c series and each subsequent series, if any) is so cut out of circuit.

It is desirable that when a bye-pass is provided the valves controlling the passages should be interconnected so as to be operable concurrentlyA and progressively. In the accompanying drawings Figure 1 is a diagrammatic perspective `view ,showing one manner of carrying out the invention; Fig.- ures 2, 3 and li'are enlarged diagrammatic cross-sections of some of the radiator tubes showing the tubes of all the series in action, one series cut out and two series cut out, respectively. Figures 5, ,6 and 7 are enlarged diagrammatic cross-sections of the, controlling cocks under like conditions, respectively; Figure 8 is a diagrammatic perspective view of a part of a modified arrangement; Figure 9 is an enlarged diagrammatic perspective view of the combined controlling cock; and Figures 10 and 11 are cross-sections of the controlling cock shown in Figure 9.

Referring iirst to the formof the invention illustrated by Figures l to 7, a pipe a leading from the water jacket (not shown) ofan aeroplaneengine/is connected with one endV of each of the tubes of three series b ....,c,....,Z....,constitutinga radiator, the opposite ends of which are connected by pipes e, f, g withthe return pipe` 7i to the Water jacket, and those endsV of the tubes b c .which are connected with "the pipe a, are' connectedalso with the return. pipe 7L by a bye-pass pipe The latter and the outlets 7 and g from the second and thirdseries of and d are provided each with its controlling valve, 7s, m, n, e. g. a spigot valve, the valves c,`m, n being 'interconnected mechanically by crankV arms o, p, f] land a rodin and the ports s, t, u (Fig ures 5,' 6, and 7) of said valves being so proportioned and arranged Vrelatively to one another that initial movement of the operating rod 1* and crank arms l0, p, g from thenormal position corresponding with the positions ofthe valves shown in Figure 5 when water passes through` all ythe tubes c .j s, .1. as shown in Figure 2, will close the valve n of the series ot tubes d and open slightly the valve ot' the bye-pass y' as shown in Figure 6, when Water will pass only through the series of tubes and c. as shown in Figure 3, Whilst further movement Will close the valve m of the series of tubes c (maintaining closed the valve n of the series (Z and open still further the byepass valve c as shown in Figure 7, when Water will pass through the series of tubes only, as shown in Figure said series of tubes Z) being always in circuit.

Figures 8 to 1l show how the passages may be controlled by a single valve o, e. g. a sleeve val-ve, into the casing of which the outlet pipes c, f, g, from the three series ot tubesb....,c...., .,openin angularly spaced relationship in the same transverse plane, as shown in Figures 9 and 10, Whilst the bye-pass pipe opens thereinto in a different transverse plane, as shown in Figures 9 and ll, the sleeve valve o itself leading interiorly by the pipe 7L to the Water jacket (not shown) of the engine and being provided with apport w adapted to control the outlet pipes f and g and with a tapered port a: adapted gradually to vary the effective cross-sectional area ot the bye-pass pipe aperture so that the latter is opened and increased progressively as the outlet pipes f and g are closed.

In this torni of the invention the bye-pass pipe 7' is connected directly between the pipes a and L, the position of said bye-pass pipe and the valve o being indicated in broken lines in Figure l.

rlfhe arrangement of tubes and the control ot the circuit is independent of the formation oi the tubes themselves, of the nature of the fluid iowing therethrough, and of the purpose to which the radiator is put, but it the radiator he constructed in accordance with the specification of Letters Patent No. 246,231, heat will be transferred to those tubes which, for the time being` are cut out ot' circuit, not only as a result ot' the interspersion of the tubes but also as Va result of the direct Contact of all the tubes Vith the corrugated back plate ot the radiator.

The invention may be applied also to the tubes of an ordinary tube-block type ot radiator.

I claim l. A radiator of the class described, comprising a plurality of series of cooling tubes adapted to be connected with the inlet and outlet openings of the Water jacket ot an engine, the tubes of a tirst series of said cooling tubes being in interspersed sequence with the tubesof the subsequent series and permanently in open circuit, each of said subsequent series of tubes having a valve mounted therein, said valves being interconnected, means for operating said valves concurrently 4and prol gressively, a valve controlled by-pass between the inlet and outlet tubes of the cooling system, and means for opening said by-pass progressively as each subsequent series is cut out of circuit.

2. A radiator as in claim 1 in which the valves controlling each ot the subsequent series of cooling tubes are combined in a single sleeve valve, the parts of the pipes connected with the series of cooling tubes being in angularly spaced relationship in one transverse plane.

3. A radiator as in claim l in which a single sleeve valve controls each ot the subsequent series of cooling tubes, the parts of the pipes connected with the series of cooling tubes being in angularly spaced relationship in one transverse plane, the pipe of the bypass being in a dilerent transverse plane, said sleeve valve being formed with a tapered part adapted to gradually vary the effective cross sectional area of the by-pass aperture, whereby the latter is opened progressively as each of the subsequent series of tubes is closed.

4. A radiator for use on an aeroplane or for a similar purpose comprising a plurality of series of tubes or the like, the tubes of one series being arranged in interspersed sequence With those of another, said tubes being connected With the Water jacket of lthe engine, one series of tubes being always in circuit, means for enabling the remainder to be cut out at Will, a valve controlled by-pass arranged between the pipes leading to an d from said Water jacket whereby said by-pass may be opened progressively as each subsequent series is cut out of circuit.

MARCEL LGBELLE. 

